Boiler



I wa /5. 50%.

g- 13, 1940- G. H. BORK 2,210,891

BOILER Filed March 28, 1959 INVENTOR'.

Mcd,.

ATTORNEY.

UNITED STATES PATENT orr cs BOILER George H. Bork, Holyoke, Mass, assignor to Harvey-Whipple, Inc., Springfield, Mass, at corporation of Massachusetts Application March 28, 1939, Serial No. 264,571

1 Claim.

This invention relates to improvements in heating apparatus and is directed more particularly to improvements in boilers for steam heating systems and the like.

The principal objects of the invention are directed to the provision of a boiler which is characterized by an outer shell having therein a plurality of interconnected flues or heating cham bers arranged in spaced relation within the shell so as to provide a relatively thin vertical water space between the heating chambers and the outer shell and a plurality of relatively narrow horizontal water spaces between the heating chambers having certain Water passageways leading through the chambers.

The construction is such that the gases pass from the combustion chamber upwardly in a zigzag manner from one heating chamber to another. The parts are preferably made from plate material so that relatively thin sections are provided and the general construction is such that the heating sections are more or less submerged in water or there are alternate layersof water and heating chambers tofacilitate the most efficient heat transfer so as to bring about quick steaming, a low cost of operation and greater efiiciency all around.

boiler is'used.

According to present-day demands boilers are required in-connection with oil burners which are adapted for quick steaming and as is well known, oil burners are operated intermittently for relatively short periods of time.

It is desired that the boiler produce steam quickly when the oil burner is put into ope-ration so as to obtain a greater amount of efiiciency and a low cost operation.

The boiler of this invention by reason of its construction and arrangement is adapted for quick steaming and efficiency in operation during the firing periods of the fuel burner.

Various other novel features and advantages of the invention will be hereinafter more fully referred to in connection with the accompanying description of the preferred form of the invention, reference being had to the drawing, wherein:

Fig. 1 is a plan view of the boiler embo the novel features of the invention;

dying (Cl. 122-156) I Fig. 2 is a sectional elevational view through the boiler as shown in Fig. 1;

Figs. 3, 4 and 5 are sectional plan views on the lines 33, 4,4, and 5--5 of Fig. 2 respectively; and r 5 Fig. 6 is a sectional elevational view on the line $fi of Fig. 4,

Referring now to the drawing more in detail, the invention will be fully described. I

The boiler of the invention and which is the 10 form shown and described is preferably of the circular type and it has an outer shell '2.

An inner cylindrical wall 4 is disposed within the shell and is spaced therefrom to provide a relatively narrow, annular, vertically disposed water space 6 between the said wall and shell 2.

A tube 8 connects the walls 2 and 4 and is for receiving the tube of an oil burner apparatus. An upper wall I0 secured to the member wall 4 is provided and in co-operation with the wall 4 provides a combustion chamber disposed in and.

spaced from the shell there being a lower connecting wall 5 between walls 2 and 4. I

Suitable refractory material indicated by I2 is provided in the combustion chamber and a tube I4 connecting the wall member 2 and 4 provides an opening to facilitate access to the combustion chamber for inspection or other purposes.

A door is co-operating with the tube 14 is lined with the refractory l8 to close the opening I4. The upper wall ill of the combustion chamber is convex in shape or is curved upwardly and inwardly from the wall 4.

Above the combustion chamber there are a plurality of separate line or heating chambers 20 and an uppermost chamber 2|, Eiach of'said chambers 20 includes a peripheral wall .22 and lower and upper walls 24 and 26. The chamber 2| has an upper wall 25 and a lower wall 21.

The upper and lower walls have their marginal 40 edges secured to the side walls thereof.

Tubular members 28 extend between and are secured to the upper wall ll] of the combustion chamber and the lower wall 24 of the heating chamber thereabove o as to provide a passageway 3.0 from the combustion chamber to the lowermost heating chamber20.

The upper walls of the chambers are connected to the lower walls of the chambers thereabove by hollow connectors such as 32, shown in Figs. 2, 3 and 4 and provide passageways from a lower chamber to an upper chamber. The connectors are arranged at opposite sides of the chambers or are staggered, as shown, so as to provide a zig- Tubular connectors such as 36 extend through the chambers 2i] and 2! and are secured to the lower and upper walls of the chambers to provide passageways 38 for water upwardly of the boiler and through the chambers.

A baflie 40 is disposed over the passageway 38 and above the upper wall of the uppermost chamber 2i, it being supported in some suitable manner from said chamber as by means of posts such as 42. One or more steam outlets such as 44 may be provided. Preferably an outlet such as 44 is located in the upper wall 3 of the shell as shown and one or more return openings such as 46 extends inwardly through the shell into the water space. There may be various t-appings in the shell such as that indicated by 48 for a safety valve and other tappings 50 for water gauge connections.

Clean out means are provided for the heating chamber and these may consist of tubes 52 connecting the shell 2 and side walls of the heating chambers. Plugs 54 are provided for closing the openings in the tubes.

Water is carried in the boiler substantially to the level indicated by the dash line W. From the foregoing it will be observed that the construction and arrangement is such that the various parts may be formed from relatively thin metal and that they may be secured together by welding.

The relatively thin plates facilitate the most efiicient heat transfer. The side walls of the chambers 26) and 2! are substantially in alignment with the wall 4 of the combustion chamber so as to provide a substantially thin vertical water space between said walls. The spacing of the heating chambers is such as to provide alternate horizontal water spaces and heating chambers the said horizontal water spaces being relatively thin as compared with the thickness of the chambers and being connected tothe vertical water space and to each other by means of members 36.

The upper and lower walls of the chambers and of the combustion chamber are curving as shown for strength and provide a structure which is adapted to withstand the stresses and strains as well as the expansion and contraction. By being curved, it is not necessary toemploy staybolts or other means to tie the walls together, they being shaped to provide units having th desired strength.

When the boiler is fired, hot gases pass upwardly from the combustion chamber into and through the passageways 30 into and through the chambers 20 and into chamber 2| and out smoke pipe 34. The gases travel in a zig-zag manner and quick steaming is accomplished by reason of the fact there is a layer of water between adjacent walls of adjacent sections. Water in the boiler tends to circulate inwardly between the sections and upwardly through the central passageway. By carrying the water level below the upper wall of the uppermost section the walls of said section provide hot surfaces so that steam is produced in a substantially dry state which is much desired.

While I have described the invention in great detail and with respect to the present preferred form thereof, it is not desired tobe limited thereto since changes and modifications may be made therein without departing from the spirit and scope of the invention. The invention may be embodied in other specific forms without departing from the essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

A boiler comprising in combination, an outer shell having vertical side walls and an upper horizontal wall, an inner combustion chamber having vertical side walls spaced from the walls of said shell providing a vertically extending water space therebetween and having a horizontal upper wall, a plurality of spaced separate heating chambers above said inner combustion chamber having vertical side walls spaced from the side walls of said shell forming a vertical water space therebetween as a continuation of the first-mentioned water space between said chamber and said shell, the upper wall of said inner combustion chamber and the upper and lower walls of said heating chambers curving inwardly and upwardly from their peripheries, hollow connections between the upper wall of said inner combustion chamber and the lower wall of the lowermost of said heating chambers and between the upper wall of each of said heating chambers and the lower wall of said heating chamber directly thereabove providing communication from said inner combustion chamber upwardly with each of said heating chambers and providing relatively narrow transverse water spaces between said heating chambers in communication with the vertically extending water spaces, a stack connected to the uppermost of said heating chambers, hollow water connectionsv extending through said heating chambers with the upper walls of the uppermost of said heating chambers and said shell being spaced to provide a steam space therebetween, said water connections through said heating chambers being so constructed and arranged as to form a substantially continuous straight passageway from the lowermost transverse water space over the cen tral portion of the upper wall of said chamber to the central portion of the steam space, and a bafile spaced above and over the said water connections.

GEORGE H. BORK. 

